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0 vs null vs undefined - explained with toilet paper (i.stack.imgur.com)

submitted 1 year ago by jeff@programming.dev to c/programmer_humor@programming.dev

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[-] traches@sh.itjust.works 2 points 1 year ago

Rust is neat because it doesn't have the bottom 2

[-] deegeese@sopuli.xyz 2 points 1 year ago

Lack of support for nulls sounds like a huge pain in the ass.

[-] labsin@sh.itjust.works 5 points 1 year ago* (last edited 1 year ago)

It has std:option

So every object that can be None or Some, needs to be checked when used. And only options can be set to None

[-] CanadaPlus@lemmy.sdf.org 5 points 1 year ago* (last edited 1 year ago)

Yeah it's a bit inaccurate to say it's not supported. It just has edge case handling written explicitly into whatever thing you're building (I assume it's required to do so in order to be well-typed). It took this idea from Haskell, which might have gotten it from Miranda or something.

[-] labsin@sh.itjust.works 2 points 1 year ago

I like the pattern a lot more. It makes you just initialize the value and only keep it 'nullable' for where it's needed and then you need to check. Even .net implemented it (but a bit more awkward)